org.simantics.g3d/src/org/simantics/g3d/toolbar/ToolBarCommandRegistry.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012, 2013 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.g3d.toolbar;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collections;\r
  16 import java.util.List;\r
  17 \r
  18 import org.eclipse.core.runtime.IConfigurationElement;\r
  19 import org.eclipse.core.runtime.IExtension;\r
  20 import org.eclipse.core.runtime.IExtensionPoint;\r
  21 import org.eclipse.core.runtime.Platform;\r
  22 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
  23 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
  24 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
  25 import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
  26 import org.simantics.g3d.Activator;\r
  27 \r
  28 \r
  29 \r
  30 \r
  31 \r
  32 public class ToolBarCommandRegistry implements IExtensionChangeHandler {\r
  33         private final static String NAMESPACE = Activator.PLUGIN_ID;\r
  34 \r
  35         private final static String EP_NAME = "toolbarCommand";\r
  36         \r
  37         private ExtensionTracker tracker;\r
  38         \r
  39         private List<ToolbarCommandExtension> extensions = new ArrayList<ToolbarCommandExtension>();\r
  40         \r
  41         \r
  42         private static ToolBarCommandRegistry INSTANCE;\r
  43         \r
  44         public static synchronized ToolBarCommandRegistry getInstance() {\r
  45                 if (INSTANCE == null)\r
  46                         INSTANCE = new ToolBarCommandRegistry();\r
  47                 return INSTANCE;\r
  48         }\r
  49         \r
  50         public static synchronized void dispose() {\r
  51                 if (INSTANCE != null) {\r
  52                         INSTANCE.close();\r
  53                         INSTANCE = null;\r
  54                 }       \r
  55         }\r
  56         \r
  57         public ToolBarCommandRegistry() {\r
  58                 tracker = new ExtensionTracker();\r
  59                 \r
  60                 IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);\r
  61                 loadExtensions(ep.getConfigurationElements());\r
  62                 \r
  63                 IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);\r
  64                 tracker.registerHandler(this, filter);\r
  65         }\r
  66         \r
  67         private void close() {\r
  68                 tracker.close();\r
  69                 tracker = null;\r
  70                 extensions.clear();\r
  71         }\r
  72         \r
  73         public synchronized List<ToolbarCommandExtension> getExtensions() {\r
  74                 return Collections.unmodifiableList(extensions);\r
  75         }\r
  76         \r
  77         private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
  78                 for (IConfigurationElement el : elements) {\r
  79                         String commandId = el.getAttribute("commandId");\r
  80                         \r
  81                         ToolbarCommandExtension ext = new ToolbarCommandExtension(commandId);\r
  82                         ext.toolbarId = el.getAttribute("toolbarId");\r
  83                         ext.image = el.getAttribute("image");\r
  84                         ext.name = el.getAttribute("name");\r
  85                         ext.type = el.getAttribute("type");\r
  86                         ext.value = el.getAttribute("value");\r
  87                         ext.contributorId = el.getContributor().getName();\r
  88                         tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
  89                         extensions.add(ext);\r
  90                         \r
  91                 }\r
  92         }\r
  93         \r
  94         @Override\r
  95     public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
  96         loadExtensions(extension.getConfigurationElements());\r
  97     }\r
  98         \r
  99         @Override\r
 100         public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
 101                 for (Object o : objects) {\r
 102                         ToolbarCommandExtension ext = (ToolbarCommandExtension) o;\r
 103                         tracker.unregisterObject(extension, ext);\r
 104                         extensions.remove(ext);\r
 105                 }\r
 106         }\r
 107         \r
 108         public synchronized List<ToolbarCommandExtension> getExtensions(String toolbarId) {\r
 109                 List<ToolbarCommandExtension> list = new ArrayList<ToolbarCommandExtension>();\r
 110                 for (ToolbarCommandExtension ext : extensions)\r
 111                         if (ext.toolbarId.equals(toolbarId))\r
 112                                 list.add(ext);\r
 113                 return list;\r
 114                 \r
 115         }\r
 116         \r
 117         public class ToolbarCommandExtension {\r
 118                 public String commandId;\r
 119                 public String toolbarId;\r
 120                 public String name;\r
 121                 public String type;\r
 122                 public String value;\r
 123                 public String image;\r
 124                 public String contributorId;\r
 125                 public ToolbarCommandExtension(String commandId) {\r
 126                         super();\r
 127                         this.commandId = commandId;\r
 128                 }\r
 129                 \r
 130                 @Override\r
 131                 public String toString() {\r
 132                         return "ToolbarCommandExtension, commandId= " + commandId + " toolbarId= " + toolbarId + " type= " + type + " value= " + value + " contributor= " + contributorId;\r
 133                 }\r
 134         }\r
 135         \r
 136         \r
 137 }\r